At least you are taking off your baby weight a lot faster than I had! And I STILL have some to lose! Ha!
But about feeling this way about your appearance... it's normal. Being pregnant, and the aftermath, and the fluctuating hormones... really is a doozy. Don't feel "insecure" about it all... You are a MOM... be proud!
4 weeks after having a baby is not long at all. Take it easy, hang loose, and give yourself credit for all that you are doing.
Next, perhaps give Hubby the benefit of the doubt? Maybe he will be a good listener and offer you some great hugs and TRY his best to help you feel better?
For me, I was always in top shape and skinny and super toned before I had my babies. I worked out daily. My Hubby called my his Sport Illustrated wife. Ha! (It's great when they think that of you even if your'e not). But, after I had my first baby... well my body went to pot. I got chubby, and was no longer toned! Even my 'cut' abs went to seed. I got a 'kangaroo pouch' too, as the other respondent said. I had had 2 c-sections. Oh well. But I STILL felt good about myself! I still felt like I could conquer the world and I still felt fine about my appearance... it just "evolved." I am a "Mom" now. Still, even though I exercise, I am not a beach-babe. But I'm fine and feel good! It's doesn't matter to me! My Hubby, he still finds me attractive and even though he is a "guy" .... he still loves me the same and he knows he's gotten a little less "toned" over the years too! No worries. We're all the same... our bodies change. It's normal. It's OKAY.
But I would try and find some solace... even if in your Husband. Just explain to him it has nothing to do with him... but as his wife, you feel you can confide in him. And, you are experiencing NORMAL baby-blues. He might surprise you and really be a comforting shoulder you can "vent" to.?
Mainly, its all about how you feel about yourself and adjust since after having a baby. It has not been long at all. A body takes about 1 year of re-adjusting (per my Doctor), after having a baby. DON"T rush it.
Take a break whenever you can, do what is relaxing and a treat for yourself. Don't be too hard on yourself. You will feel more comfortable about it all.
All the best,
Susan